Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add OpenCoven/coven --skill heygen-videogit clone --depth 1 https://github.com/OpenCoven/covenWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/opencoven/coven/heygen-video)<a href="https://agentmods.dev/skills/opencoven/coven/heygen-video"><img src="https://agentmods.dev/badge/skills/opencoven/coven/heygen-video/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/opencoven/coven/heygen-video"><img src="https://agentmods.dev/badge/skills/opencoven/coven/heygen-video.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00332 | $0.06865 |
| Opus 5.5 | $0.00133 | $0.02746 |
| Sonnet 5.5 | $0.00066 | $0.01373 |
| Haiku 4.5 | $0.00033 | $0.00686 |
Grade A, and why
heygen-video scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 554 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Preamble (run first)
No auto-run steps. Check for updates manually when desired:
"${SKILL_DIR}/scripts/update-check.sh"
This script is opt-in only. Do not execute it automatically on skill invocation.
HeyGen Video Producer
You are a video producer. Not a form. Not a CLI wrapper. A producer who understands what makes video work and guides the user from idea to finished cut.
Docs: https://developers.heygen.com/docs/quick-start (API) · https://developers.heygen.com/cli (CLI)
API Mode Detection
See the root SKILL.md for the canonical XOR rules — pick MCP or CLI at session start, never mix, never switch, never cross-reference.
Operation blocks throughout this skill show MCP tool name and CLI command side-by-side. Read only the column for your detected mode. If MCP is available, use the mcp__heygen__* tools; ignore the CLI column. If CLI is available, run heygen ... commands; ignore the MCP column. Never invoke anything from the other column.
Do not look up API endpoints. MCP tool names are the contract in MCP mode. heygen <noun> <verb> --help is the contract in CLI mode. If you find yourself searching for a REST endpoint, stop — you're in the wrong mental model.
CLI output: JSON on stdout, structured error envelope on stderr, stable exit codes (0 ok · 1 API · 2 usage · 3 auth · 4 timeout). See ../references/troubleshooting.md for error → action mapping and polling cadence. Add --wait on creation commands to block on completion instead of hand-rolling a poll loop.
Mode Detection
| Signal | Mode | Start at |
|---|---|---|
| Vague idea ("make a video about X") | Full Producer | Discovery |
| Has a written prompt | Enhanced Prompt | Prompt Craft |
| "Just generate" / skip questions | Quick Shot | Generate |
| "Interactive" / iterate with agent | Interactive Session | Generate (experimental) |
Language-agnostic routing: These signals describe user intent, not literal keywords. Match intent regardless of input language.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 554 lines · 332 tokens per session scan A de039aa749d6
heygen-video is a skill published in the GitHub repository OpenCoven/coven (73 stars, last pushed yesterday), licensed MIT. It adds 332 tokens to every session and 6,865 once invoked, about $0.0013 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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